back number will sing the theme song for NTV's upcoming drama 'Koi wa Deep ni' that's scheduled to premiere on April 14.

'Koi wa Deep ni' is a love comedy starring Ishihara Satomi and Ayano Go. It will portray the "forbidden love" between Nagisa Mio (Ishihara), an oceanographer who loves the ocean and fish, and Hasuda Rintaro (Ayano), the son of a prominent family who just returned from London. Titled "Kaitou," the theme song was produced by Kobayashi Takeshi (Bank Band) and written by Shimizu Iyori (Vo, G) after reading the drama's script. You can listen to a clip of the song in the drama's trailer below.